[virtio] Add comprehensive testing guide

- Added TESTING.md with test procedures for legacy and modern VirtIO
- Documented QEMU command lines for both modes
- Included device-specific testing instructions
- Added debugging tips and common issues section

Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2025-12-04 15:53:55 +00:00
co-authored by BernardXiong
parent ee5dac3daa
commit 4c01059cf2
File diff suppressed because it is too large Load Diff